Driver for dandy-rolls



y 30, 1933- w. B. CLEMENTS DRIVER FOR DANDY ROLLS Filed 001;. 29, 1952 Patented May 30, 1933 UNITED STATES WILLIAM B. CLEMENTS, OF KALAMAZOO, MICHIGAN, ASSIGNOR COMPANY; OF KALAMAZOO, MICHIGAN PATENT OFFICE .TO BRYANT PAPER DRIVER FOR DANDY-ROLLS Application filed October 29, 1932. Serial No. 640,193.

is in process of formation.

Second, to provide such a machine in which the dandy-roll is driven in such a way that it does not disturb the sheet formation.

Third, to provide simple and posltive means for driving the dandy-roll.

Fourth, to provide such means for dr1v1ng the dandy-roll in synchronlsm W1 th the apron or wire of the machine to elnnmate drag or pick-up that results from havlng the dandy-roll driven by friction on the top of the partially formed sheet of paper on the apron. 7

Fifth, to provide such means that are of simple and economical constructlon and are positive in operation.

Further objects and advantages perta ning to details and economies of construction and operation will appear from the description to follow. 2

A preferred embodiment of my invention is illustrated in the accompanying drawing, in which:

Fig. 1 is a side elevational 'view of my improved dandy-roll construction.

Fig. 2 is a detail view taken from the right side of Fig. 1.

Fig. 3 is a detail view partly in section, of a portion of the apparatus shown in Figs. 1 and 2.

Fig. 4 is a perspective view of my improved construction with some of the parts omitted to show the relation of the dandyroll to the table roll.

The parts are identified by their numerals of reference which are the same throughout the several views.

1 is a bracket having a hanger 2 suspended therefrom and having an adjusting screw 3, spring 4, cam 5, and crank or lever 6 to raise or lower the hanger which is slidably mounted on the bracket.

7 represents a bearing portion on which the dandy-roll 8 is lifted when it is raised from the sheet. I

- The dandy-roll 8 is of usual construction of wire mesh, but has a portion 9 at each end thereof that extends beyond the apron or wire 10 of the ordinary paper making machine. e

- On the opposite side of the apron 10from the dandy-roll 8 is a table roll 11 of usual construction, that has a portion 12 at each end extending beyond the apron 10 and in proximity to the extended portion 9 of the dandy-roll.

Around the extended portion 12 of the table roll is a rubber band 13 adapted to engage the extended roll. The table roll 11 is frictionally rotated by the passage of apron 10 thereover, and the rubber band 13 on the portion 12 of the table roll supports and friotionally drives the dandy-roll so that it turns at a circumferential velocity equal to the velocity of the apron 10, thus avoiding pickup and disturbance of the sheet formation on the apron 10, which would result were the dandy-roll supported and driven by the sheet which is here indicated at 14.

The table roll 11 is journaledon journals 15 in bearings 16'. In orderv to adjust the position of the table roll the'dandy-roll, there are provided adjusting screws 17 and 18 for adjusting the hori zontal position of the table roll relative to therdandy-roll. With this adjustment, it is possible to adjust the table roll to any desired position for any desired thickness of paper sheet on the apron without interfering with the function of the dandy-roll 8.

I have shown the rubber band 13 on the extended portion 12 of the table roll 11, but it would be possible, without departing from my invention,wto place the band'13 around the extended-portion'9 of the dandy-roll 8. I have shown the band 13 as being of rubber. Without departing from the invention, any suitable friction driving means could be used and the band need not be separate from the roll to which it. isattached.

It would be possibleto build up the table roll or the dandy-roll to provide the driving relative to that of v portion 9 of the dandyportion, and any engaging means on the extended portions of the rolls could be used.

The use of my improved apparatus eliminates pick-up and drag on the sheet, because the turning of the dandy-roll 8 and the passage of the apron 10 therebeneath arersynchronize'd through the frictional drive of the table roll 11 by the face of the apron 10 on which face there is no sheet of paper.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a paper making machine having an apron on bination of a dandy-roll having portions extending beyondthe edges of said apron, a table roll on the opposite side of said apron and-adapted to be frictionally driven thereby and having portions extending beyond the edge of the apron having rubber bands therearound adapted to engage the extend ing portions of'said dandy-roll and support and fr'ictionally drive said dandy-roll, journals on said .table roll, and bearingblocks therefor having horizontal and vertical adjusting screws to adjust the position of said table roll in relation to said dandy-roll.

2. In a paper making machine having an apron onwhich the sheet is formed, the combination of a dandy-roll having portions extending beyond the edges of said apron, a table roll on the opposite side of said apron and adapted to be frictionally driven thereby and having portions extending beyond the edge of the apron having rubber bands therearound adapted to engage the extending portions of said dandy-roll and frictionally drive said'dandy-ro'll, journals on said table roll, and bearing blocks therefor having horizontal and vertical adjusting screws to adjust the position of said table roll in relation to said dandy-roll.

3. In a paper making machine having an apron on which the sheet is formed, the com-, bination of a dandy-roll having portions extending beyond the edges of said apron, a:

table roll on the opposite side of said apron and adapted to be frictionally driven thereby .and having portions extending beyond the edge of the apron having rubber bands ing portions of said dandy-rolland frictionally' drive said dandy-roll, and means for adjusting the position of said table roll in relation to said dandy-roll.

4. Inapaper making machine having an apron on which combination of a dandy-roll having portions extending beyond the edges of'said apron, a table roll on the opposite side of said apron and adapted to be frictionally driven there by and having portions extending beyond the edge of the apron having means adapted .to engage the extending portions of said" dandy-roll and support "and frictionally which the sheet is formed, the comthe sheet is formed, the

drive said dandy-roll, journals on said table roll, and bearing blocks therefor having horizontal and vertical adjusting screws to adjust the position of said table roll in relation to said dandy-roll.

5. In a paper making machine having an apron on which the sheet is formed," the combinationvof a dandy-roll having a portion extending beyond the edge of the apron, a table roll on the opposite side of the apron and adapted to be driven thereby and having a portion extending beyond the edge of the apron, a rubber band around one of said extending portions adapted to engage the other of said extending portions, whereby the dandy-roll is driven by said table roll,

and means to adjustthe rolls relative 'to one 7 7 another. V

6. In a paper making-machine having an apron on which the sheet is formed, the combination of a dandy-roll having a portion extending beyond the edge of :the apron, a table roll on the opposite side of the apron and adapted to be driven thereby and having a portion extending beyond the edge of the apron, means on one of said extending portions adapted to engage the other of said extending portions, whereby the dandy-roll is driven bysaid'table roll, and means to adjust the rolls relative to one another.

7. In a paper making machine having an apron on which the sheet is formed, the combination of a dandy-roll, a table roll on the other side of said apron adapted to be driven thereby, means on said table roll adapted .to engage and support and drive said dandyroll, and means to one another.

8. In a paper making machine having an apron on which the sheet is formed, the combination of a dandy-roll, a table roll on the other side ofsaid apron adapted to be driven thereby, and means on said table roll adapted to engage and support and drive said dandy-roll. i f V i V 9. In a paper making machine having an apron on which the sheet is formed, the com bination of a dandy-roll, a table roll on the other side of said apron adapted to be driven thereby, and means whereby said table roll drives said dandy-rollj to adjust said rolls relative In witness whereof have hereunto s'et' 

